Folding box



S. FREUND.

FOLDING BOX.

APPLICATION FILED DEC. 12, |919.

1,388,7 1 4. y Patented July 5, 1921'.`

Hilf a l l 'h5 l 6W i 11 i :fr l l I' E 5 D n M15 nl 195 J5 VJ9 73fzzyerzaramg/{M} SAMUEL FREUND, 0F CHICAGO, ILLINOIS.

FOLDING BOX.

Application led December 12, 1919. Serial No. 344,382.

To all whom t may concern.'

ABe it known that l, SAMUEL FREUND, a citizen of the United States, anda resident of Chicago, in the county of Cook and State of Illinois, haveinvented new and useful Improvements in Folding Boxes, of which thefollowing is a specification. g

My invention relates to paper boxes and particularly to that class inwhich the container member and the cover member are each formed from asingle piece of paper, ber, or other suitable material bent to form thesides and ends, together with means for interlocking such sides and endsat the corners. As at present constructed lock corner boxesl have thetendency to break in the corners, the locking tongue sliding out of thereceiving slot or breaking off in the box after insertion. An importantobject of my invention is therefore to overcome the weaknesses in priorboxes by improved corner locking mechanism.

Another object of the invention is to provide such arrangement and shapeof tongue and slot construction that the locking tongues will underpressure automatically guide themselves into the slot and willthereafter form strong interlocking engagement with the materialsurrounding the slot.

Another object of the invention is to provide such construction andarrangement that the box will be heavily reinforcedat the corners wherestrength is mostly necessary.

The above and other features of lmylinvention are clearly disclosed onthe accompanying drawing in which Figure 1 is an end elevational view ofthe box cover showing one corner partly open,

Fig. 2 is yan end elevational view of the container member with one endin vertical section to show theinterlocking engagement at the corner,

Fig. 3 is a plan view of the formed blank of paper from which the covermember is 'folded up, and

Fig. 4 is a plan view of the paper blank from which the body orcontainer member is folded up.

TheJ cover member and container member are each formed from a singlepiece of paper or other suitable material. A rectangular piece of paperfor the cover memberis creased longitudinally near its sides along thelines 5 `and 6, and is creased or scored transversely near its endsalong the lines 7 andy 8f Ille score lines divide the blanks into therectangular body part 9, the sides 10 and 11 and the ends-12 andl 13.These ends are cut along lineswhich are coincident with the longitudinalscoring lines 5 and 6, such cutting being indicated by the referencecliaractei'14, the cutting extending as far as the transverse scorelines 7 and 8 respectively. Cutting along the line 14 produces thecorner sections or flaps 15 which form continuations of the sides10 and11 and are hinged at the score lines 7 and 8 respectively. Extendingfrom substantially the center of the hinge line of each corner anddiagonally toward the outer point of such corner is a slot v16, thelaterally extending slot section 16 forming a continuation of the slot16, the two forming a more or less L shaped slot which surrounds atongue 17. Eachof the sides 12 and 13 is .cut transversely a distanceinwardly from each corner thereof, the cut being represented by thecharacter `18. The outer end of the paper section 'between the cut andthe adj acent edge cf the sides is cut away to leave a shorttongue orstub 19, cutting being on the bias so as to leave the inclined end edge2O on each tongue or stub. The cuts 18 are more in the nature of slots,`that is they have width.

The arrangement forV the container member shown in Fig. 4 is the same asthat for the cover member of Fig. 3 except that the location of thecuttings is different. Instead of cutting the ends 12 and 13 as at 14,the sides 10 and 11 are cut in coincidence with the folding lines 7 and8 as indicated by the reference character 21, this leaving the cornersor liaps 22 Vhinged to the ends 12 and 13 instead of to .the'sides VTheslots 23, 23 inthe corners extend fro'rnfthefoldi ing lines 5 and 6respectively, and the tongues 24 corresponding to .the tongues 19 'ofthe cover member are formed at the ends of the sides 10 and 11.

To form the cover member vthe blank of Fig. 3 is folded along the lines5, 6, 7 and 8 into position at right angles with the body section 9. Thecorners 15 which were also folded along the lines 7 and 8 are placed onthe inside. The tongues '17 are then de- `flected outwardly a distanceso that the stubs the slot as the sides and ends of the container partare brought together into positions at right angles with each other. Assoon as the point of a stub leaves the end e of a corresponding slot thestub drops through the slot, the tongues 17 and the stubs 19 at thevarious corners being then in interlocking engagement which can only bbroken by forcible relative movement of the sides and ends in directionsat right angles with the body section 9.

To form the other member of the box the blank shown in Fig. 4 is foldedalong the lines 5, 6, 7 and 8 and the corners 22 ar arranged against theinside of the side walls 10 and 11. During shifting of the corners intosuch position the. stubs 24 pass through the slots 23, 23', the tonguesand stubs being` finally brought into interlocking engagement.

As the corners 15 of the container part are held against the ends 12 and13, and the corners 22 of the cover part are held against the sides 10and 11, the box structure is heavily reinforced at its corners where thegreatest strength and rigidity is required. The stubs 19 and 24 beingshort and the tongues 17 being likewise short, and these members beingheld together in interlocking engagement after folding, the stubs andtongues cannot readily break off and their disengagement is preventedexcept by relative movement between the corners and box sides in adirection at right angles to the body sections of the members. 1 thusproduce a very strong and reliable box having maximum capacity for theamount of paper used for its construction. improved interlockingarrangement is applicable on different styles of boxes.

1 claim as follows 1. 1n a foldable paper box, side and end walls,corner sections hinged at the ends of said walls, a slot in each cornersection and a tongue surrounded by such slot, and a stub formed alongthe edge of tbe adjacent side of the box for engaging in' said slot,said stub having an inclined edge for facilitating' its passage intosaid slot, said tongue and stub interlocking after passage of the stubthrough said slot.

2. A paper box member folded longitudinally and transversely near itsedges to form sides, one set of sides being cut in line coincident withthe folding line for the other side to leave corner sections, saidcorner sections having each an L shaped slot, the side sections betweensaid corner sections having sections cut away to leave stubs formedalong theedge of the sectiomsaid stubs extending through said slots tohave interlocking engagement with the corner sections.

3. A paper box member formed from a rectangular sheet of paper foldedtransversely and longitudinally near its ends to :user-5,714c

form end and side sections, the end sections being cut across coincidentwith the folding line for the side sections, whereby the ends aredivided into central sections and corner sections, said corner sectionshaving slots extending outwardly from their folding lines, and stubsformed along the edge of the sides of the end center sections forextending through said slots and interlockingly engaging with the cornersections when the paper blank is folded. n

4. A paper box member formed by folding a rectangular paper blanklongitudinally and transversely to form side and end walls, the endwalls being cut transversely in line coincident with the folding linesof the side walls whereby such end walls are converted into centralsections and corner sections, each corner section having a slotextending diagonally from its base toward its outer point, said centersections being cut away at their outer corners to leave stubs formedalong the edge, said stubs passing through said slots for interlockingengagement with said corner sections when the paper blank is folded up.

5. A paper box member formed by folding a rectangular paper blanklongitudinally and transversely to form sideand end walls, the end wallsbeing cut transversely in line coincident with the folding lines of theside walls whereby such end walls are converted into central sectionsand corner sections, each corner section having a slot extendingdiagonally from its base toward its outer point, said center sectionsbeing cut away at their outer corners to leave stubs, 'said stubs formedalong the edge passing through said slots for interlocking engagementwith said corner sections when the paper blank is folded up, the ends ofsaid stubs being inclined whereby to facilitate entrance of said stubsvthrough said slots.

6. A. blank for forming paper box members in the form of a rectangularsheet, longitudinal and transverse scoring lines near the ends of saidsheet for determining the end walls, said sheet at opposite ends beingcut transversely coincidentally with the foldline wherebyyto divide eachend section into a middle section and corner sections, the cornersections having diagonal slots extending from their bases toward theirouter point, and stubs formed along the edge at the outer corners of theadjacent center section forentering said slots and interlockinglyengaging with the corner sections.

7. A. paper box` member folded longitudinally and transversely near itsedges to form sides, one set of sides being cut in line coincident withthe folding line for the other side to leave corner sections, saidcorner sections having each an L shaped slot, the side sections betweensaid corner sections'having sections cut away to leave stubs formedalong the edge, said stubs extending through said slots to have a rigidinterlocking engagement with the corner sections.

8. A paper box member folded longitudinally and transversely near itsedges to form sides and a body section, one Set of sides being cnt inline coincident With the folding line for the other Side to leave cornersections, said corner sections having each an L shaped slot, the sidesections between said corner Sections having Sections out away to leavestubs formed along'the edge, said stubs extending through said slots tohave a rigid interlocking engagement With the corner sections andadapted to be disengaged only by a relative movement between the corners15 and box Sides in a direction at right angles SAMUEL FREUND.

